TH=$1
if [ ! $FTP_PATH ];then
	FTP_PATH="/var/ftp"
fi

#ftp登录用户名
FTP_USER_NAME=$2
if [ ! $FTP_USER_NAME ];then
	FTP_USER_NAME="ftpUser"
fi

#ftp登录用户名密码
FTP_PASSWORD=$3
if [ ! $FTP_PASSWORD ];then
	FTP_PASSWORD="123456"
fi

#设置被动模式下，建立数据传输可使用的端口范围的最小值。
PASV_MIN_PORT=$4
if [ ! $PASV_MIN_PORT ];then
	PASV_MIN_PORT=50000
fi

#设置被动模式下，建立数据传输可使用的端口范围的最大值。
PASV_MAX_PORT=$5
if [ ! $PASV_MAX_PORT ];then
	PASV_MAX_PORT=50010
fi

##运行以下命令，安装vsftpd。
yum install -y vsftpd

##运行以下命令，设置FTP服务开机自启动。
systemctl enable vsftpd.service

##创建一个Linux用户并设置密码
useradd $FTP_USER_NAME
echo $FTP_PASSWORD | passwd --stdin $FTP_USER_NAME

#如果目录不存在，创建目录
if [ ! -d $FTP_PATH ];then
   mkdir $FTP_PATH
fi

##运行以下命令只更改$FTP_PATH目录的拥有者为$FTP_USER_NAME
chown -R $FTP_USER_NAME: $FTP_PATH

if [ ! -d /etc/vsftpd ];then
   mkdir /etc/vsftpd
fi

cd /etc/vsftpd

rm -f vsftpd.conf

#获取公网ip
ip=`curl ident.me`

#修改vsftpd.conf配置文件。
cat >>/etc/vsftpd/vsftpd.conf<<EOF
# Example config file /etc/vsftpd/vsftpd.conf
#
# The default compiled in settings are fairly paranoid. This sample file
# loosens things up a bit, to make the ftp daemon more usable.
# Please see vsftpd.conf.5 for all compiled in defaults.
#
# READ THIS: This example file is NOT an exhaustive list of vsftpd options.
# Please read the vsftpd.conf.5 manual page to get a full idea of vsftpd's
# capabilities.
#
# Allow anonymous FTP? (Beware - allowed by default if you comment this out).
anonymous_enable=NO
#
# Uncomment this to allow local users to log in.
# When SELinux is enforcing check for SE bool ftp_home_dir
local_enable=YES
#
# Uncomment this to enable any form of FTP write command.
write_enable=YES
#
# Default umask for local users is 077. You may wish to change this to 022,
# if your users expect that (022 is used by most other ftpd's)
local_umask=022
#
# Uncomment this to allow the anonymous FTP user to upload files. This only
# has an effect if the above global write enable is activated. Also, you will
# obviously need to create a directory writable by the FTP user.
# When SELinux is enforcing check for SE bool allow_ftpd_anon_write, allow_ftpd_full_access
anon_upload_enable=YES
#
# Uncomment this if you want the anonymous FTP user to be able to create
# new directories.
#anon_mkdir_write_enable=YES
#
# Activate directory messages - messages given to remote users when they
# go into a certain directory.
dirmessage_enable=YES
#
# Activate logging of uploads/downloads.
xferlog_enable=YES
#
# Make sure PORT transfer connections originate from port 20 (ftp-data).
connect_from_port_20=YES
#
# If you want, you can arrange for uploaded anonymous files to be owned by
# a different user. Note! Using "root" for uploaded files is not
# recommended!
#chown_uploads=YES
#chown_username=whoever
#
# You may override where the log file goes if you like. The default is shown
# below.
#xferlog_file=/var/log/xferlog
#
# If you want, you can have your log file in standard ftpd xferlog format.
# Note that the default log file location is /var/log/xferlog in this case.
xferlog_std_format=YES
#
# You may change the default value for timing out an idle session.
#idle_session_timeout=600
#
# You may change the default value for timing out a data connection.
#data_connection_timeout=120
#
# It is recommended that you define on your system a unique user which the
# ftp server can use as a totally isolated and unprivileged user.
#nopriv_user=ftpsecure
#
# Enable this and the server will recognise asynchronous ABOR requests. Not
# recommended for security (the code is non-trivial). Not enabling it,
# however, may confuse older FTP clients.
#async_abor_enable=YES
#
# By default the server will pretend to allow ASCII mode but in fact ignore
# the request. Turn on the below options to have the server actually do ASCII
# mangling on files when in ASCII mode. The vsftpd.conf(5) man page explains
# the behaviour when these options are disabled.
# Beware that on some FTP servers, ASCII support allows a denial of service
# attack (DoS) via the command "SIZE /big/file" in ASCII mode. vsftpd
# predicted this attack and has always been safe, reporting the size of the
# raw file.
# ASCII mangling is a horrible feature of the protocol.
#ascii_upload_enable=YES
#ascii_download_enable=YES
#
# You may fully customise the login banner string:
#ftpd_banner=Welcome to blah FTP service.
#
# You may specify a file of disallowed anonymous e-mail addresses. Apparently
# useful for combatting certain DoS attacks.
#deny_email_enable=YES
# (default follows)
#banned_email_file=/etc/vsftpd/banned_emails
#
# You may specify an explicit list of local users to chroot() to their home
# directory. If chroot_local_user is YES, then this list becomes a list of
# users to NOT chroot().
# (Warning! chroot'ing can be very dangerous. If using chroot, make sure that
# the user does not have write access to the top level directory within the
# chroot)
#chroot_local_user=YES
#chroot_list_enable=YES
# (default follows)
#chroot_list_file=/etc/vsftpd/chroot_list
#
# You may activate the "-R" option to the builtin ls. This is disabled by
# default to avoid remote users being able to cause excessive I/O on large
# sites. However, some broken FTP clients such as "ncftp" and "mirror" assume
# the presence of the "-R" option, so there is a strong case for enabling it.
#ls_recurse_enable=YES
#
# When "listen" directive is enabled, vsftpd runs in standalone mode and
# listens on IPv4 sockets. This directive cannot be used in conjunction
# with the listen_ipv6 directive.
listen=YES
#
# This directive enables listening on IPv6 sockets. By default, listening
# on the IPv6 "any" address (::) will accept connections from both IPv6
# and IPv4 clients. It is not necessary to listen on *both* IPv4 and IPv6
# sockets. If you want that (perhaps because you want to listen on specific
# addresses) then you must run two copies of vsftpd with two configuration
# files.
# Make sure, that one of the listen options is commented !!
#listen_ipv6=YES

pam_service_name=vsftpd
userlist_enable=YES
tcp_wrappers=YES


#在配置文件的末尾添加下列参数：
#设置本地用户登录后所在目录。
local_root=$FTP_PATH
#全部用户被限制在主目录。
chroot_local_user=YES
#启用例外用户名单。
chroot_list_enable=YES
#指定例外用户列表文件，列表中用户不被锁定在主目录。
chroot_list_file=/etc/vsftpd/chroot_list
#开启被动模式。
pasv_enable=YES
allow_writeable_chroot=YES
#本示例中为Linux服务器的公网IP。
pasv_address=$ip
#设置被动模式下，建立数据传输可使用的端口范围的最小值。
#建议您把端口范围设置在一段比较高的范围内，例如50000~50010，有助于提高访问FTP服务器的安全性。
pasv_min_port=$PASV_MIN_PORT
#设置被动模式下，建立数据传输可使用的端口范围的最大值。
pasv_max_port=$PASV_MAX_PORT
EOF

rm -f chroot_list 

cat >>/etc/vsftpd/chroot_list<<EOF
$FTP_USER_NAME
EOF

##运行以下命令，启动FTP服务
systemctl start vsftpd.service

##运行以下命令，查看FTP服务的端口号。
netstat -antup | grep ftp

if [ $? -ne 0 ];then
    echo "ftp启动失败，请排查原因，退出脚本";
    exit;
else
    echo "ftp 启动成功，请稍后手动登录云服务器,在安全组中放通TCP 21、$PASV_MIN_PORT-$PASV_MAX_PORT端口";
fi
